Liott



(No Model.)

G. M. ELLIOTT. ATTACHMENT TOR' SQUARBS.

No. 599,168. Patented Fab. 15, 1898.

By Arron/ms.

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UNITED STATES PATENTy OFFICE. V

GEORGE MAURICE ELLIOTT, OF WINNIPEG, CANADA.

ATTACHMENT-FOR ysau/TRES.

SPECIFICATION forming part of Letters Patent. No. 599,168, dated February 15, 18.98.

Application led March 2 5, 1S 9 7,l

To all whom it may concern: y

Be it known that I, GEORGE MAURICE EL- LIOTT, of Winnipeg, in the Province of Manitoba and Dominion of Canada, have invented a new and Improved Fence Attachment for Squares, of which the following is a full, clear, and exact description. Y

The object of the invention is to provide a new and improved attachment for mechanics squares, whereby the operator is enabled to conveniently and rapidly draw square, bevel, and oblique lines in any conceivable position, the attachment being very simple and du# rable in construction and readily applied to the square.

The invention consists principally of a bar formed with a longitudinal slot for the passage of the square, and clamps for fastening said bar to the arms of the square, each clamp being provided with a clamping-screw engaging a transverse'slot formed longitudinally in said bar.

The invention also consists of certain parts and details and combinations of the same, as lwill be fully described hereinafter and then pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the gures.

Figure 1 is a side elevation of the improvement as applied. Fig. 2 is a like view of the same with the bar in a dierent position. Fig. 3 is an enlarged transverse section of the improvement on the line 3 3 of Fig. l. Fig. 4i is an enlarged transverse section of the improvement on the line 4 4 of Fig. 2, and Fig. 5 is a transverse section of the improvement on the line 5 5 of Fig. 1.

The improved attachment forsquares is provided with a bar A, made of two L-shaped rails A and A2, connected with each other at their outer ends by separating-blocks A3, fastened in place by rivets A4, as plainly indicated in Figs. l, 2, and 5. By this arrangement the two bars A A2 form a longitudinal slot for the passage of an ordinary framingsquare B, as is plainly illustrated in Figs. l, 2, and 3, said slot permitting of adjusting the bar A on the arms of the framing-square according to the figure to be drawn. t

Figs. l, 2, and 3. 'gages the forked ends of a clamp D, fitted Now in order to hold the bar in place on th serai No. 6291189. (No model.)

arms of the framing-square B, I provide the vertical parts of the rails A A2 with a longitudinal slot A?, extending ltransversely and 'adapted to be engaged by a clamping-bolt C,

adapted to rest on the corresponding arm of the framinglsquare B, as is plainly shown in The clamping-bolt C enupon a corresponding arm of the square B land adapted to be fastened in place on the arm by a set-screw E, screwing in the under side of the clamp D to abut against the edge of the arm of the framing-square B. Thus the clamp D is securely fastened in place, as the bolt C engages one edge of the arm and the set-screw E engages the other edge of the corresponding arm to firmly hold the clamp D and with it the bar A in place.

It is understood that by -loosening the `thumb-nut on the bolt C the bar A can be readily moved longitudinally on the framingsquare B, and by loosening the said screw E the clamps can be shifted on the arms of the framing-square to bring the bar A into proper position relatively to the arms of the framingsquare.

When it is desired to bring the bar A into the position shown in Fig. 2-that is, along one of the arms of the framing-square B- then the clamp D, engaging the other arm, is connected at its bolt C by a link F with the slot A5 of the bar A, said link F carrying a clamping-bolt C', similar to the clamping-bolt C. When itis desired to swing the bar A from the corner of the two arms of the framing-square B, as indicated in dotted lines in Fig. 2, then the clamping-bolt C of one clamp D is passed through a transverse aperture A, formed in one end of the bar A, as is plainly shown in the drawings. By this arrangement the bar A can be swung into an angular posi tion from the corner of the framing-square, it being understood that the bar is held in place from one of the arms of the framingsquare by the other clamp D and the link F.

vNow it will be seen that by the arrange--l ment described the device can be readily applied on an ordinary mechanics framingsquare and adjusted thereon in any desired position to permit of conveniently drawing square, bevel, or oblique lines along the edges of the framing-square, as the bar A IOO abuts against the edge of the article on which thelines are intended to be drawn. By having two rails A' and A2 on opposite sides of the framing-square B it is evident that they can be reversed to draw corresponding lines in opposite directions. This device will be found to be very serviceable to carpenters, bridge-builders, and other mechanics.

The bar A may be placed in the position shown in dotted lines in Fig. l for engaging the edge of the work when a right line isto be drawn. v shown may be readily given tothe bai* A on the framing-square for certain special work.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patentv... .a l, A A device lof then classdescribed, .comprising a bar consisting of two L-shaped nails rigidly connected with eachf other near `their ends by separating-blocks, said rails forming a longitudinal slot for the passage of the arms of a square, clamps adapted to engage the arms of the square, each clamp having a Other positions besides the ones" set-screw, a clamping-bolt adapted toengage opposite edges of the square, said clamp being also adapted to engage a longitudinal slot formed transversely in said bar, and a link for connecting one of said clamps with said bar, as set forth.

2. A square attachment having two rails rigidly connected and spaced apart whereby to' form aI bar, two clamps capable of embracing arms of the square, each clamp having a set-screw engaging one edge of the square, one

of the clamps being in connection with the rails, and a link attached to the bars and to the remaining clamp.

3. A square attachment having a bar, a

vclamp attached directly to the bar, a link at- 

